XCMG Crane Parts XCMG Parts clutch master cylinder860530945
1. Description
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Applicable models XCMG: QY25K5C_2 QY70KC QY50KC QY25K5D_2 QY25KC XCT35_BR QY25K5D_3 QY25K5D_3 QY25K5C_1 QY55KC_1 QY25K5F_1 QY50KC QY50K5C_1 QY25K5C_2 QY25K5F QY25K5C QY25K5D_2 QY30KC QY55K5C_2 QY25K5F_1 QY25K5D_1 QY30KC QY55K5D
XCT80L6 XCT130_1 XCT12 XCT80L6 XCT25L4_S XCA40_M XCA30_JY XCT25L5_3 XCT55L5 XCT110_1 XCT60L6 XCT12 XCT25L5_SR XCT25L5_2 XCT95L7 XCT75L7 QY110K8C QY95K7C QY110K7C XCT100 XCT75_S QY40KC XCT90 XCT25 XCT25L5_E QY70KC QY40K5C_2 XCT60L6_1 QY75KC QY100K7C QY95KH QY100K6C QY50JW XCT16_1 XCT100_BR XCT60 QY20K5D QY85KC XCT25 XCT80L5 XCT100 XCT20L5_1 XCT75L6 XCT20L5 XCT80_S XPD36 QY16KC QY16KC QY40K5D_1 QY25K5L XCA40 QY40KD QY80K5D QY70K5D_1 QY50KD QY20K5C XCT50_Y XCT16_Y XCT25L4_Y XCT80_Y XCT60_Y XCT50_Y and other XCT QY RT series models
2. Product introduction
When the driver depresses the clutch pedal, the push rod pushes the master cylinder piston to increase the oil pressure and enters the wheel pump through the hose, forcing the wheel pump rod to push the release fork and push the release bearing forward; when the driver releases the clutch pedal, The hydraulic pressure is released, the release fork gradually returns to its original position under the action of the return spring, and the clutch is in the engaged state again.
There is a radial oblong through hole in the middle of the clutch master cylinder piston. The direction limiting screw passes through the oblong hole of the piston to prevent the piston from rotating. The oil inlet valve is installed in the axial hole at the left end of the piston, and the oil inlet valve seat is inserted through the straight hole on the piston surface. in the piston bore.
When the clutch pedal is not stepped on, there is a gap between the push rod of the master cylinder and the piston of the master cylinder. Due to the limit of the oil inlet valve by the direction limiting screw, there is a small gap between the oil inlet valve and the piston. In this way, the oil storage cylinder is communicated with the left cavity of the master pump through the pipe joint, the oil passage, the oil inlet valve and the oil inlet valve. When the clutch pedal is depressed, the piston moves to the left, and the oil inlet valve moves to the right relative to the piston under the action of the return spring, eliminating the gap between the oil inlet valve and the piston.
Continue to step on the clutch pedal, the oil pressure in the left cavity of the master cylinder rises, the brake fluid in the left cavity of the master cylinder enters the booster through the oil pipe, the booster works, and the clutch is disengaged.
Release the clutch pedal, the piston moves to the right faster under the action of the co-located spring, because the brake fluid has a certain resistance in the flow of the pipeline, the speed of the flow back to the master cylinder is slow, so a certain pressure is formed in the left cavity of the master cylinder. Vacuum degree, the oil inlet valve moves to the left under the action of the pressure difference between the left and right oil chambers of the piston, and a small amount of brake fluid in the oil storage tank flows into the left chamber of the master cylinder through the oil inlet valve to make up for the vacuum. When the brake fluid that originally entered the booster from the master cylinder flows back to the master cylinder, excess brake fluid appears in the left cavity of the master cylinder, and the excess brake fluid will flow back to the oil storage tank through the oil inlet valve.
